Optometry device

Abstract

An optometry device for testing an individual's eye (E) comprises an imaging module (10) adapted to produce a first image at a variable distance for the individual's eye (E), a beam splitter (26) arranged to combine the first image and a second image for the individual's eye (E), and a screen (22) facing the beam splitter (26). A mirror (24) is arranged in combination with the screen (22) to produce the second image to be visible by the individual's eye via the beam splitter (26).

The invention claimed is: 
     
       1. An optometry device for testing an eye of an individual, the optometry device comprising:
 an imaging module configured to produce a first image at a variable distance for the eye of the individual, said imaging module including
 a first screen producing a first light beam, and 
 a pair of mirrors successively reflecting the first light beam, disposed at a right angle with respect to each other and held on a base which is slidably mounted on a support of the imaging module; 
 
 a beam splitter configured to combine the first image and a second image for the eye of the individual; 
 a second screen facing the beam splitter; and 
 an additional mirror disposed in combination with the second screen to produce the second image to be visible by the eye of the individual via the beam splitter, the additional mirror being concave, the second screen and the additional mirror being positioned such that a second light beam corresponding to the second image is transmitted from the second screen to the additional mirror via the beam splitter and reflects on the additional mirror towards the beam splitter. 
 
     
     
       2. The optometry device according to  claim 1 , wherein the imaging module is positioned such that the first light beam corresponding to the first image is transmitted across the beam splitter towards the individual's eye of the individual. 
     
     
       3. The optometry device according to  claim 2 , wherein the second screen and the additional mirror are positioned such that the second light beam corresponding to the second image reflects on the beam splitter towards the eye of the individual. 
     
     
       4. The optometry device according to  claim 2 , wherein the screen is a video display. 
     
     
       5. The optometry device according to  claim 2 , further comprising an image device configured to image the second image at a second variable distance for the eye of the individual. 
     
     
       6. The optometry device according to  claim 1 , wherein the second screen and the additional mirror are positioned such that the second light beam corresponding to the second image reflects on the beam splitter towards the eye of the individual. 
     
     
       7. The optometry device according to  claim 6 , wherein the screen is a video display. 
     
     
       8. The optometry device according to  claim 1 , wherein the screen is a video display. 
     
     
       9. The optometry device according to  claim 1 , further comprising an image device configured to image the second image at a second variable distance for the eye of the individual. 
     
     
       10. The optometry device according to  claim 1 , further comprising a variable refraction module interposed between the beam splitter and the eye of the individual. 
     
     
       11. The optometry device according to  claim 10 , wherein the variable refraction module includes a lens with variable spherical refraction power. 
     
     
       12. The optometry device according to  claim 10 , wherein the variable refraction module includes a pair of independently rotatable lenses with cylindrical refraction power. 
     
     
       13. The optometry device according to  claim 1 , further comprising light sources configured to illuminate an area situated opposite the eye of the individual with respect to the beam splitter. 
     
     
       14. The optometry device according to  claim 1 , further comprising:
 a first housing enclosing the imaging module; and 
 a second housing enclosing the beam splitter, the additional mirror and the second screen. 
 
     
     
       15. The optometry device according to  claim 1 , wherein the first image corresponds to an optotype. 
     
     
       16. The optometry device according to  claim 1 , further comprising:
 a casing enclosing the imaging module, the beam splitter, the second screen, and the additional mirror; and 
 an illuminator configured to produce a variable ambient light inside the casing. 
 
     
     
       17. The optometry device according to  claim 1 , wherein the first screen is an LCD screen. 
     
     
       18. An optometry device for testing an eye of an individual, the optometry device comprising:
 an imaging module configured to produce a first image at a variable distance for the eye of the individual; 
 a beam splitter configured to combine the first image and a second image for the eye of the individual; 
 a screen facing the beam splitter; 
 a mirror disposed in combination with the screen to produce the second image to be visible by the eye of the individual via the beam splitter, the mirror being concave, the screen and the mirror being positioned such that a second light beam corresponding to the second image is transmitted from the screen to the mirror via the beam splitter and reflects on the mirror towards the beam splitter. 
 
     
     
       19. An optometry device according to  claim 18 , wherein the screen is a video display.